Grinding tool



FIG. 1 is a top, right, front perspective view of the grinding tool in accordance with my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a right-side elevation view thereof, the left-side elevation view being identical thereto; and,

FIG. 7 is a bottom, left, rear perspective view. 

CLAIM The ornamental design for a “grinding tool,” as shown and described. 